/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.nhncorp.neptune.client.nql.element;

import com.nhncorp.neptune.client.RowFilter;
import com.nhncorp.neptune.common.conf.NConfiguration;

/**
 * @author jindolk
 *
 */
public class Operator implements WhereExpressionElement, ExpressionElement {
  public static enum OPERATOR {
    EQ("="),
    GT(">"),
    GT_EQ(">="),
    LT("<"),
    LT_EQ("<="),
    AND("AND"),
    OR("OR");
    
    String name;
    OPERATOR(String name) {
      this.name = name;
    }
    
    public String toString() {
      return name;
    }
  }
  
  private OPERATOR op;
  
  public Operator(OPERATOR op) {
    this.op = op;
  }
  
  @Override
  public String getQuery(NConfiguration conf) {
    return op.toString();
  }

  public OPERATOR getOp() {
    return op;
  }

  @Override
  public void initFilter(RowFilter rowFilter) {
    // TODO Auto-generated method stub
    
  }
  
  public boolean equals(Object obj) {
    if(!(obj instanceof Operator)) {
      return false;
    }
    
    Operator targetOp = (Operator)obj;
    return op == targetOp.op;
  }
}
